Locomotive-furnace device.



J. BOLGIANO. LOGOMOTIVE FURNAGE DEVICE.

APPLICATION FILED $1111.24, 1911.

Patented Sept. 12,1911.

moms/E78 COLUMBIA PLANOQRAPH CO.,WASHINGTON. D. c.

UNITED srnrns PATENT OFFICE.

JOHN BOLGIANO, OF BALTIMORE, MARYLAND.

LOCOMOTI'VE-FURNA'CE DEVICE.

T 0 all whom it may concern:

Be it known that I, JoHN BOLGIANO, a citizen of the United States of America, residing at the city of Baltimore, State of Maryland, have invented certain new and useful Improvements in Locomotive-Furnace Devices, of which the following is a specification.

My invention relates to an apparatus for supplying heated air to the fire chamber of a furnace for the purpose of promoting combustion of smoke and unoxidized furnace gases, the apparatus being so constructed as to resist the action of the fire.

I have designed my apparatus to be used upon a locomotive furnace, but it is equally applicable to a stationary steam boiler or other furnace.

Heretofore it has been common practice to promote the combustion of furnace gases by supplying to the furnace a supply of air above the fire in regulated quantities heated to a greater or less temperature, and the devices by which this result is accomplished have greater or less advantage, but all of them, as far as I know, are subject to the very high temperature of the fire under conditions which will destroy them.

My invention is designed to provide an apparatus which will heat and supply air for the furnace while exposed to the fire and yet not be destroyed by the fire. It is well known that the only way in which sheet iron can be protected against the destructive action of fire is by water circulation. I have adopted this method of protecting my apparatus from the fire while at the same time utilizing all the heat absorbed by the water to make steam.

In the drawings similar numerals indicate the same part in all figures.

In the drawings-Figure 1 is a longitudinal section part broken away of a locomotive boiler and fire boX. Fig. 2 is a vertical transverse section part broken away of the water leg on one side of the boiler and of my heating drum showing also a part of the grate. Fig. 3 is a vertical face View Of my Specification of Letters latent.

Application filed January 24, 1911.

Patented Sept. 12, 1911.

Serial No. 604,468.

heating drum showing its connect-ions to the boiler.

Referring to the drawings, Fig. 2, 1 is the water leg of the boiler, 2 the grate, 3 my iinproved water drum made of sheet iron about three or four inches thick, and about three by four feet high and long and having a projecting foot 4 at the lower end which projects over the grate. 5-5 are pipes secured in the surface of the water leg of the boiler at one end and into the surface of the heating drum at the other so as to maintain a channel or channels for water circulation between these two members. The heat-ing drum is mounted parallel to the water leg, and spaced therefrom about two inches, so as to form a vertical channel 6 between them. At its lower end this channel communicates with the ash pit and receives air therefrom. 7 is a valve mounted in the channel below the heater, and between it and the wall of the ash pit, and which controls the admission of air from the ash pit to the heating channel 6, 'l Vhen this valve is open, air, under natural or forced draft, will enter the heating channel 6 and will be heated by contact with the walls of the channel, the water leg of the boiler on one side and the heating drum on the other, to the temperature of those surfaces, and will pass up through this channel 6 to the upper part of the furnace where it will be emitted into the furnace and be mixed with the furnace gases. Combustion will then occur and smoke and unconsumed gases in that part of the furnace will be burned and additional heat for the boiler obtained. The heating drum being filled with water in rapid circulation will not be burned, but the water therein will be highly heated and a large amount of steam will be produced.

Having thus described my invention, what I claim and desire to secure by Letters Patent is: i

The combination of a thin fiat drum mounted vertically within the furnace parallel to one of its walls but spaced therefrom and having a laterally projecting foot tween the drum and the wall behind it being at its lower end extending toward the fire and overlapping the grate, and closing the space between the drum and the grate, the drum having water tubes connecting it with the boiler so as to maintain a water circulation therethrough, the channel formed bedelivering heated air to the upper part of the fire chamber.

Signed'by me at Baltimore city and State of Maryland this 20thday of January 1911.

JOHN BOLGIANO. Witnesses:

EDWARD L. BASH, S. R. WARNKEN.

in communication with an air supply and Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

